Investigation of Cation Exchange Behaviors of FA(x)MA(1−x)PbI(3) Films Using Dynamic Spin-Coating

In this study, we fabricated and characterized uniform multi-cation perovskite FA(x)MA(1−x)PbI(3) films. We used the dynamic spin-coating method to control the cation ratio of the film by gradually increasing the FA+, which replaced the MA+ in the films. When the FA+ concentration was lower than xFA...

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Detalles Bibliográficos
Autores principales: Yu, Hyang Mi, Jeong, Byeong Geun, Park, Dae Young, Lim, Seong Chu, Namkoong, Gon, Jeong, Mun Seok
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585367/
https://www.ncbi.nlm.nih.gov/pubmed/34771948
http://dx.doi.org/10.3390/ma14216422
Descripción
Sumario:In this study, we fabricated and characterized uniform multi-cation perovskite FA(x)MA(1−x)PbI(3) films. We used the dynamic spin-coating method to control the cation ratio of the film by gradually increasing the FA+, which replaced the MA+ in the films. When the FA+ concentration was lower than xFA ~0.415 in the films, the stability of the multi-cation perovskite improved. Above this concentration, the film exhibited δ-phase FAPbI(3) in the FA(x)MA(1−x)PbI(3) films. The formation of δ-phase FAPbI(3) disturbed the homogeneity of the photoluminescence spatial distribution and suppressed the absorption spectral bandwidth with the increasing bandgap. The precise control of the cation ratio of multi-cation perovskite films is necessary to optimize the energy-harvesting performance.

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